Refrigerator



FIG. 1 is a perspective view of a refrigerator, in accordance with the present invention.

FIG. 2 is a front view of the refrigerator in FIG. 1.

FIG. 3 is a side view of the refrigerator in FIG. 1; and,

FIG. 4 is a top view of the refrigerator in FIG. 1. 

The ornamental design for a refrigerator, as shown and described. 